[    2.116355] ------------[ cut here ]------------
[    2.116391] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/160
[    2.116426] Modules linked in:
[    2.116444] CPU: 3 UID: 0 PID: 160 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.116475] Tainted: [W]=WARN
[    2.116486] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.116507] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.116523] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[    2.116570] RSP: 0018:ff4e05be403dfcc8 EFLAGS: 00010286
[    2.116588] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.116611] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f243079800
[    2.116634] RBP: 0000000000000000 R08: ff3b34f243338b50 R09: ff3b34f244cea02c
[    2.116653] R10: ff3b34f2430c5118 R11: fefefefefefefeff R12: 0000000000000000
[    2.116674] R13: 0000000000000010 R14: ff3b34f2430c5000 R15: ff3b34f243079800
[    2.116701] FS:  00007fab0a3f2740(0000) GS:ff3b34f2d1c16000(0000) knlGS:0000000000000000
[    2.116724] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.116743] CR2: 0000561add34f310 CR3: 0000000004d7c006 CR4: 0000000000771ef0
[    2.116763] PKRU: 55555554
[    2.116770] Call Trace:
[    2.116780]  <TASK>
[    2.116791]  rtmsg_ifinfo+0x3c/0xa0
[    2.116803]  register_netdevice+0x889/0x9f0
[    2.116815]  register_netdev+0x1e/0x30
[    2.116826]  loopback_net_init+0x57/0xb0
[    2.116842]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.116859]  ops_init+0x68/0x140
[    2.116872]  setup_net+0x85/0x150
[    2.116883]  copy_net_ns+0xf5/0x200
[    2.116897]  create_new_namespaces+0x117/0x2f0
[    2.116913]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.116935]  ksys_unshare+0x346/0x5e0
[    2.116949]  __x64_sys_unshare+0x12/0x20
[    2.116960]  do_syscall_64+0x104/0xfc0
[    2.116974]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.116989] RIP: 0033:0x7fab0a4edbcb
[    2.117001] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
[    2.117052] RSP: 002b:00007ffdfaafb708 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.117074] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fab0a4edbcb
[    2.117097] RDX: 0000000000000000 RSI: 00007ffdfaafb470 RDI: 0000000040000000
[    2.117116] RBP: 00007ffdfaafba90 R08: 00007ffdfaafb660 R09: 0000000000000000
[    2.117137] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.117166] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000561add352b68
[    2.117190]  </TASK>
[    2.117199] ---[ end trace 0000000000000000 ]---
[    2.119952] ------------[ cut here ]------------
[    2.119971] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/160
[    2.120001] Modules linked in:
[    2.120016] CPU: 3 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.120045] Tainted: [W]=WARN
[    2.120057] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.120077] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.120091] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[    2.120141] RSP: 0018:ff4e05be403dfd68 EFLAGS: 00010286
[    2.120163] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.120187] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f243079800
[    2.120207] RBP: 0000000000000000 R08: ff3b34f2430a7110 R09: ff3b34f244cef030
[    2.120230] R10: ff3b34f244cb4118 R11: fefefefefefefeff R12: 0000000000000000
[    2.120252] R13: 0000000000000010 R14: ff3b34f244cb4000 R15: ff3b34f243079800
[    2.120277] FS:  000000002489c400(0000) GS:ff3b34f2d1c16000(0000) knlGS:0000000000000000
[    2.120299] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.120317] CR2: 00007febe3406000 CR3: 0000000004c5c001 CR4: 0000000000771ef0
[    2.120338] PKRU: 55555554
[    2.120346] Call Trace:
[    2.120356]  <TASK>
[    2.120365]  rtmsg_ifinfo+0x3c/0xa0
[    2.120379]  register_netdevice+0x889/0x9f0
[    2.120392]  __tun_chr_ioctl+0x83c/0x16c0
[    2.120406]  ? do_sys_openat2+0x9a/0xe0
[    2.120421]  __x64_sys_ioctl+0xa1/0xe0
[    2.120433]  do_syscall_64+0x104/0xfc0
[    2.120445]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.120460] RIP: 0033:0x47cc8d
[    2.120471] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[    2.120517] RSP: 002b:00007fffbe866370 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.120541] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.120562] RDX: 00007fffbe8663f0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.120584] RBP: 00007fffbe8663c0 R08: 0000000000000000 R09: 0000000000000000
[    2.120604] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffbe8668c8
[    2.120627] R13: 00007fffbe866948 R14: 0000000000000002 R15: 0000000000543540
[    2.120651]  </TASK>
[    2.120657] ---[ end trace 0000000000000000 ]---
[    2.120687] ------------[ cut here ]------------
[    2.120703] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/160
[    2.120728] Modules linked in:
[    2.120742] CPU: 3 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.120772] Tainted: [W]=WARN
[    2.120782] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.120800] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.120817] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[    2.120859] RSP: 0018:ff4e05be403dfd60 EFLAGS: 00010286
[    2.120876] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.120897] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f243079800
[    2.120924] RBP: 0000000000000002 R08: ff3b34f2430a7110 R09: ff3b34f244cef030
[    2.120944] R10: ff3b34f244cb4118 R11: fefefefefefefeff R12: 0000000000000000
[    2.120967] R13: 0000000000000010 R14: ff3b34f244cb4000 R15: ff3b34f243079800
[    2.120988] FS:  000000002489c400(0000) GS:ff3b34f2d1c16000(0000) knlGS:0000000000000000
[    2.121008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.121028] CR2: 00007febe3406000 CR3: 0000000004c5c001 CR4: 0000000000771ef0
[    2.121048] PKRU: 55555554
[    2.121055] Call Trace:
[    2.121061]  <TASK>
[    2.121069]  rtnetlink_event+0x6e/0xb0
[    2.121081]  notifier_call_chain+0x6d/0x100
[    2.121094]  netdev_update_features+0x56/0x60
[    2.121108]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.121120]  ? file_init_path+0x62/0x120
[    2.121134]  __x64_sys_ioctl+0xa1/0xe0
[    2.121150]  do_syscall_64+0x104/0xfc0
[    2.121160]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.121176] RIP: 0033:0x47cc8d
[    2.121186] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[    2.121233] RSP: 002b:00007fffbe8663b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.121253] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.121276] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.121297] RBP: 00007fffbe866400 R08: 0000000000000005 R09: 0000000000001ff0
[    2.121323] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fffbe8668c8
[    2.121347] R13: 00007fffbe866948 R14: 0000000000000002 R15: 0000000000543540
[    2.121366]  </TASK>
[    2.121374] ---[ end trace 0000000000000000 ]---
[    2.121402] ------------[ cut here ]------------
[    2.121418] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/160
[    2.121444] Modules linked in:
[    2.121454] CPU: 3 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.121483] Tainted: [W]=WARN
[    2.121495] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.121512] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.121528] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[    2.121571] RSP: 0018:ff4e05be403dfc10 EFLAGS: 00010286
[    2.121586] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.121609] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f243079800
[    2.121628] RBP: 0000000000000000 R08: ff3b34f2430a7110 R09: ff3b34f244cec030
[    2.121652] R10: ff3b34f244cb4118 R11: fefefefefefefeff R12: 0000000000000000
[    2.121674] R13: 0000000000000010 R14: ff3b34f244cb4000 R15: ff3b34f243079800
[    2.121698] FS:  000000002489c400(0000) GS:ff3b34f2d1c16000(0000) knlGS:0000000000000000
[    2.121719] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.121738] CR2: 00007febe3406000 CR3: 0000000004c5c001 CR4: 0000000000771ef0
[    2.121758] PKRU: 55555554
[    2.121766] Call Trace:
[    2.121772]  <TASK>
[    2.121779]  rtmsg_ifinfo+0x3c/0xa0
[    2.121790]  __dev_notify_flags+0xb1/0xf0
[    2.121803]  netif_change_flags+0x54/0x70
[    2.121814]  dev_change_flags+0x45/0x80
[    2.121825]  devinet_ioctl+0x607/0x7f0
[    2.121838]  inet_ioctl+0x229/0x240
[    2.121850]  ? __rtnl_unlock+0x35/0x60
[    2.121861]  sock_do_ioctl+0x75/0x140
[    2.121875]  __x64_sys_ioctl+0xa1/0xe0
[    2.121888]  do_syscall_64+0x104/0xfc0
[    2.121901]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.121918] RIP: 0033:0x47cc8d
[    2.121930] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[    2.121977] RSP: 002b:00007fffbe866390 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.121998] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.122022] RDX: 00007fffbe866400 RSI: 0000000000008914 RDI: 0000000000000006
[    2.122043] RBP: 00007fffbe8663e0 R08: 0000000000000005 R09: 0000000000001ff0
[    2.122063] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fffbe8668c8
[    2.122084] R13: 00007fffbe866948 R14: 0000000000000002 R15: 0000000000543540
[    2.122106]  </TASK>
[    2.122113] ---[ end trace 0000000000000000 ]---
[   47.099669] ------------[ cut here ]------------
[   47.099738] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/160
[   47.099800] Modules linked in:
[   47.099823] CPU: 3 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.099884] Tainted: [W]=WARN
[   47.099909] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.100570] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.100604] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[   47.100716] RSP: 0018:ff4e05be403dfb58 EFLAGS: 00010286
[   47.100752] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.100805] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f243079500
[   47.100847] RBP: 0000000000000000 R08: ff3b34f2430a7110 R09: ff3b34f244cec030
[   47.100895] R10: ff3b34f244cb4118 R11: fefefefefefefeff R12: 0000000000000000
[   47.100938] R13: 0000000000000010 R14: ff3b34f244cb4000 R15: ff3b34f243079500
[   47.100983] FS:  0000000000000000(0000) GS:ff3b34f2d1c16000(0000) knlGS:0000000000000000
[   47.101028] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.101064] CR2: 00007febe3406000 CR3: 0000000016a42002 CR4: 0000000000771ef0
[   47.101104] PKRU: 55555554
[   47.101118] Call Trace:
[   47.101131]  <TASK>
[   47.101147]  rtmsg_ifinfo+0x3c/0xa0
[   47.101166]  netif_close_many+0xed/0x190
[   47.101193]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.101223]  ? __queue_work+0x141/0x550
[   47.101247]  unregister_netdevice_queue+0x9e/0xd0
[   47.101276]  __tun_detach+0x591/0x5b0
[   47.101300]  tun_chr_close+0x3f/0xc0
[   47.101321]  __fput+0xe8/0x2c0
[   47.101346]  task_work_run+0x63/0xa0
[   47.101370]  do_exit+0x2c1/0xba0
[   47.101391]  do_group_exit+0x2d/0xc0
[   47.101414]  get_signal+0x82e/0x900
[   47.101436]  arch_do_signal_or_restart+0x77/0x2b0
[   47.101468]  exit_to_user_mode_loop+0x75/0x4a0
[   47.101499]  do_syscall_64+0x439/0xfc0
[   47.101529]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.101560] RIP: 0033:0x4c2d9e
[   47.101580] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.101613] RSP: 002b:00007fffbe865d20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.101657] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.101699] RDX: 0000000000000014 RSI: 00007fffbe865e00 RDI: 0000000000000007
[   47.101741] RBP: 00007fffbe865d30 R08: 00007fffbe865dc0 R09: 000000000000000c
[   47.101779] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000248a4cc0
[   47.101820] R13: 00007fffbe866948 R14: 00007fffbe865ef0 R15: 0000000000543540
[   47.101862]  </TASK>
[   47.101874] ---[ end trace 0000000000000000 ]---
[   47.101989] ------------[ cut here ]------------
[   47.102019] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[   47.102071] Modules linked in:
[   47.102096] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.102153] Tainted: [W]=WARN
[   47.102174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.102209] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.102236] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[   47.102328] RSP: 0018:ff4e05be403dfbc8 EFLAGS: 00010286
[   47.102357] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.102397] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f241de8100
[   47.102441] RBP: 0000000000000000 R08: ff3b34f2430a7110 R09: ff3b34f244cf0830
[   47.102482] R10: ff3b34f244cb4118 R11: fefefefefefefeff R12: 0000000000000000
[   47.102527] R13: 0000000000000011 R14: ff3b34f244cb4000 R15: ff3b34f241de8100
[   47.102571] FS:  0000000000000000(0000) GS:ff3b34f2d1a96000(0000) knlGS:0000000000000000
[   47.102613] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.102645] CR2: 00007f5024fc3f98 CR3: 0000000016a42006 CR4: 0000000000771ef0
[   47.102690] PKRU: 55555554
[   47.102703] Call Trace:
[   47.102714]  <TASK>
[   47.102730]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.102758]  unregister_netdevice_queue+0x9e/0xd0
[   47.102780]  __tun_detach+0x591/0x5b0
[   47.102805]  tun_chr_close+0x3f/0xc0
[   47.102826]  __fput+0xe8/0x2c0
[   47.102850]  task_work_run+0x63/0xa0
[   47.102874]  do_exit+0x2c1/0xba0
[   47.102896]  do_group_exit+0x2d/0xc0
[   47.102916]  get_signal+0x82e/0x900
[   47.102941]  arch_do_signal_or_restart+0x77/0x2b0
[   47.102968]  exit_to_user_mode_loop+0x75/0x4a0
[   47.103000]  do_syscall_64+0x439/0xfc0
[   47.103023]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.103054] RIP: 0033:0x4c2d9e
[   47.103074] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.103108] RSP: 002b:00007fffbe865d20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.103149] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.103190] RDX: 0000000000000014 RSI: 00007fffbe865e00 RDI: 0000000000000007
[   47.103235] RBP: 00007fffbe865d30 R08: 00007fffbe865dc0 R09: 000000000000000c
[   47.103279] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000248a4cc0
[   47.103324] R13: 00007fffbe866948 R14: 00007fffbe865ef0 R15: 0000000000543540
[   47.103371]  </TASK>
[   47.103387] ---[ end trace 0000000000000000 ]---
[   47.110471] ------------[ cut here ]------------
[   47.110519] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[   47.110583] Modules linked in:
[   47.110607] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.110650] Tainted: [W]=WARN
[   47.110671] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.110706] Workqueue: netns cleanup_net
[   47.110728] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.110756] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[   47.110851] RSP: 0018:ff4e05be4023fc78 EFLAGS: 00010286
[   47.110877] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.110910] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3b34f241de8100
[   47.110957] RBP: 0000000000000000 R08: ff3b34f243338b50 R09: ff3b34f2432b382c
[   47.111000] R10: ff3b34f2430c5118 R11: fefefefefefefeff R12: 0000000000000000
[   47.111043] R13: 0000000000000011 R14: ff3b34f2430c5000 R15: ff3b34f241de8100
[   47.111092] FS:  0000000000000000(0000) GS:ff3b34f2d1a96000(0000) knlGS:0000000000000000
[   47.111138] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.111168] CR2: 00007fd36ec62f98 CR3: 0000000002f62006 CR4: 0000000000771ef0
[   47.111207] PKRU: 55555554
[   47.111222] Call Trace:
[   47.111237]  <TASK>
[   47.111252]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.111282]  default_device_exit_batch+0x318/0x390
[   47.111310]  ops_undo_list+0x10b/0x240
[   47.111331]  cleanup_net+0x1d7/0x2e0
[   47.111354]  process_one_work+0x162/0x360
[   47.111378]  worker_thread+0x16e/0x2d0
[   47.111401]  ? rescuer_thread+0x510/0x510
[   47.111427]  kthread+0xe1/0x120
[   47.111449]  ? kthread_park+0xa0/0xa0
[   47.111471]  ret_from_fork+0x16d/0x250
[   47.111494]  ? kthread_park+0xa0/0xa0
[   47.111520]  ret_from_fork_asm+0x11/0x20
[   47.111545]  </TASK>
[   47.111561] ---[ end trace 0000000000000000 ]---